Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017JD028104 |
On the Forward Modelling of Radar Dopppler Spectrum Width From LES: Implications for Model Evalution | |
Chen, Y-S1; Verlinde, J.1; Clothiaux, E. E.1; Ackerman, A. S.2; Fridlind, A. M.2; Chamecki, M.3; Kollias, P.4,5; Kirkpatrick, M. P.6; Chen, B-C1; Yu, G.1,7; Avramov, A.2,8 | |
2018-07-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:14页码:7444-7461 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Australia |
英文摘要 | Large-eddy simulations of an observed single-layer Arctic mixed-phase cloud are analyzed to study the value of forward modeling of profiling millimeter wave cloud radar Doppler spectral width for model evaluation. Individual broadening terms and their uncertainties are quantified for the observed spectral width and compared to modeled broadening terms. Modeled turbulent broadening is narrower than the observed values when the turbulent kinetic energy dissipation rate from the subgrid scale model is used in the forward model. The total dissipation rates, estimated with the subgrid scale dissipation rates and the numerical dissipation rates, agree much better with both the retrieved dissipation rates and those inferred from the power spectra of the simulated vertical air velocity. The comparison of the microphysical broadening provides another evaluative measure of the ice properties in the simulation. To accurately retrieve dissipation rates as well as each broadening term from the observations, we suggest a few modifications to previously presented techniques. First, we show that the inertial subrange spectrum filtered with the radar sampling volume is a better underlying model than the unfiltered -5/3 law for the retrieval of the dissipation rate from the power spectra of the mean Doppler velocity. Second, we demonstrate that it is important to filter out turbulence and remove the layer-mean reflectivity-weighted mean fall speed from the observed mean Doppler velocity to avoid overestimation of shear broadening. Finally, we provide a method to quantify the uncertainty in the retrieved dissipation rates, which eventually propagates to the uncertainty in the microphysical broadening. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441965400025 |
WOS关键词 | LARGE-EDDY SIMULATIONS ; MIXED-PHASE CLOUDS ; DOPPLER SPECTRA ; DISSIPATION RATE ; BOUNDARY-LAYER ; AIRCRAFT OBSERVATIONS ; SMAGORINSKY MODEL ; NUMERICAL ERRORS ; TURBULENCE ; STRATOCUMULUS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32477 |
专题 | 气候变化 |
作者单位 | 1.Penn State Univ, Dept Meteorol & Atmospher Sci, University Pk, PA 16802 USA; 2.NASA, Goddard Inst Space Studies, New York, NY 10025 USA; 3.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA; 4.SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA; 5.Brookhaven Natl Lab, Environm & Climate Sci Dept, Upton, NY 11973 USA; 6.Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW, Australia; 7.Co Gen Geophys, Houston, TX USA; 8.Emory Univ, Dept Environm Sci, Atlanta, GA 30322 USA |
推荐引用方式 GB/T 7714 | Chen, Y-S,Verlinde, J.,Clothiaux, E. E.,et al. On the Forward Modelling of Radar Dopppler Spectrum Width From LES: Implications for Model Evalution[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(14):7444-7461. |
APA | Chen, Y-S.,Verlinde, J..,Clothiaux, E. E..,Ackerman, A. S..,Fridlind, A. M..,...&Avramov, A..(2018).On the Forward Modelling of Radar Dopppler Spectrum Width From LES: Implications for Model Evalution.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(14),7444-7461. |
MLA | Chen, Y-S,et al."On the Forward Modelling of Radar Dopppler Spectrum Width From LES: Implications for Model Evalution".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.14(2018):7444-7461. |
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